SwipeRefreshLayout setRefreshing()最初没有显示指标

Question

我有一个非常简单的布局,但是当我打电话setRefreshing(true)在onActivityCreated()我的片段,将其最初不显示.

它只显示我何时刷新.任何想法为什么它最初没有出现？

片段xml:

<android.support.v4.widget.SwipeRefreshLayout
    android:id="@+id/swipe_container"
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical">

        </RelativeLayout>


    </ScrollView>
</android.support.v4.widget.SwipeRefreshLayout>

片段代码:

public static class LinkDetailsFragment extends BaseFragment implements SwipeRefreshLayout.OnRefreshListener {

    @InjectView(R.id.swipe_container)
    SwipeRefreshLayout mSwipeContainer;

    public static LinkDetailsFragment newInstance(String subreddit, String linkId) {
        Bundle args = new Bundle();
        args.putString(EXTRA_SUBREDDIT, subreddit);
        args.putString(EXTRA_LINK_ID, linkId);

        LinkDetailsFragment fragment = new LinkDetailsFragment();
        fragment.setArguments(args);

        return fragment;
    }

    public LinkDetailsFragment() {
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);

        mSwipeContainer.setOnRefreshListener(this);
        mSwipeContainer.setColorScheme(android.R.color.holo_blue_bright,
                android.R.color.holo_green_light,
                android.R.color.holo_orange_light,
                android.R.color.holo_red_light);
        mSwipeContainer.setRefreshing(true);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        final View rootView = inflater.inflate(R.layout.fragment_link_details, container, false);
        ButterKnife.inject(this, rootView);
        return rootView;
    }

    @Override
    public void onRefresh() {
        // refresh
    }
}

Answer 1

面对同样的问题.我的解决方案

mSwipeRefreshLayout.post(new Runnable() {
    @Override
    public void run() {
        mSwipeRefreshLayout.setRefreshing(true);
    }
});

Answer 2

请参阅Volodymyr Baydalka的回答.

这些是旧的解决方法.

曾经在早期版本上运行android.support.v4,但从版本21.0.0开始,它不起作用,并且仍然存在android.support.v4:21.0.3于2014年12月10日至12日发布,这就是原因.

在setRefreshing(true)调用之前不会出现SwipeRefreshLayout指示符SwipeRefreshLayout.onMeasure()

解决方法:

调用setProgressViewOffset()的SwipeRefreshLayout是invalidtes布局造成的圈子视图SwipeRefreshLayout.onMeasure()立即调用.

mSwipeRefreshLayout.setProgressViewOffset(false, 0,
                (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 24, getResources().getDisplayMetrics()));
mSwipeRefreshLayout.setRefreshing(true);

更新更好的解决方法

因为当方向更改或您手动设置了操作栏大小时,操作栏可能会变薄.我们设置了此视图顶部的偏移量(以像素为单位),在成功滑动手势到当前操作栏大小后,进度微调器应该重置.

TypedValue typed_value = new TypedValue();
getActivity().getTheme().resolveAttribute(android.support.v7.appcompat.R.attr.actionBarSize, typed_value, true);
mSwipeRefreshLayout.setProgressViewOffset(false, 0, getResources().getDimensionPixelSize(typed_value.resourceId));

更新2014年11月20日

如果视图启动后,您的应用程序显示SwipeRefreshLayout并不是非常重要.您可以使用处理程序或任何您想要的东西将它发布到将来的某个时间.

举个例子.

handler.postDelayed(new Runnable() {

    @Override
    public void run() {
        mSwipeRefreshLayout.setRefreshing(true);
    }
}, 1000);

或者作为Volodymyr Baydalka的回答提到.

这里是问题在Android问题跟踪.请用它来表示我们需要修复它.

Answer 3

我的解决方案是覆盖SwipeRefreshLayout:

public class MySwipeRefreshLayout extends SwipeRefreshLayout {

    private boolean mMeasured = false;
    private boolean mPreMeasureRefreshing = false;

    public MySwipeRefreshLayout(final Context context) {
        super(context);
    }

    public MySwipeRefreshLayout(final Context context, final AttributeSet attrs) {
        super(context, attrs);
    }

    @Override
    public void onMeasure(final int widthMeasureSpec, final int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        if (!mMeasured) {
            mMeasured = true;
            setRefreshing(mPreMeasureRefreshing);
        }
    }

    @Override
    public void setRefreshing(final boolean refreshing) {
        if (mMeasured) {
            super.setRefreshing(refreshing);
        } else {
            mPreMeasureRefreshing = refreshing;
        }
    }
}

Answer 4

mRefreshLayout.getViewTreeObserver()
                .addOnGlobalLayoutListener(
                        new ViewTreeObserver.OnGlobalLayoutListener() {
                            @Override
                            public void onGlobalLayout() {
                                mRefreshLayout
                                        .getViewTreeObserver()
                                        .removeGlobalOnLayoutListener(this);
                                mRefreshLayout.setRefreshing(true);
                            }
                        });

Answer 5

使用Android支持库24.2.0,问题应该已经解决了! https://developer.android.com/topic/libraries/support-library/revisions.html#24-2-0-bugfixes